Re: [Xen-devel] ARM64 EFI runtime

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

Hi Brijesh,

EFI runtime services are not currently exported to Dom0. They are still
a work in progress.

Regards,

Stefano

On Mon, 12 Oct 2015, Brijesh Singh wrote:
> Hi All,
> 
> I noticed that DOM0 kernel fails to get time via RTC device on AMD ARM64 
> (Seattle) platform. On this platform Linux uses rtc-efi driver to get the 
> time through EFI runtime services, and I know for sure that driver works well 
> outside the Xen environment. It seems that devicetree passed to DOM0 through 
> Xen does not contain UEFI system table information hence DOM0 fails to probe 
> rtc-efi platform driver. I see the below message in DOM0 dmesg log
> 
> [    0.000000] bootconsole [uart0] enabled
> [    0.000000] efi: Getting EFI parameters from FDT:
> [    0.000000] efi: UEFI not found.
> [    0.000000] cma: Reserved 16 MiB at 0x00000083df000000
> 
> 
> Looking at Xen's common/efi/runtime.c indicates that EFI runtime services are 
> not yet supported on ARM platform, is anyone working on it? 
> 
> Thanks
> Brijesh
> 
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> 

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